Case Material: Impact resistant ABS case.^^Dimensions/Weight: Face cap Diameter: 1.3 in. (3.25 cm) ; Max Width: 2.25 in. (5.7 cm) ; Max Depth: 1.6 in. (4.0 cm) including head strap & mounting plate ; Weight: 2.75 oz. (78.5 grams) with batteries and strap^^Lens: Unbreakable polycarbonate lens^^Light Source: 0.5 Watt high-flux white LED; 30,000 hours rated LED life^^Light Output: ; High: 850 candela peak beam intensity; 14.5 lumens; runs 6 hours ; Low: 6 lumens; runs 12 hours^^On/Off: Push-button switch: 1st mode = Low; 2nd mode = High^^Battery: Two “AAA” alkaline batteries (included)^^Features: ; High-flux LED – Reflector focused for 100 ft.+ range ; Solid State power regulation provides maximum light output throughout battery life ; Integral hat clip attaches to brim of cap ; Packaged with batteries and integrated rubber/elastic head strap